Fly-exit screen



Jan. 15, 1929. 1,699,402

J. MARsDEN FLY EXI T S GREEN Filed Jan. 16, 1928 JNVENTOR. Jrem za/zMans-den LIZ disclosed in Patent No. 1,441,104

Patented Jans E5, 1929.

UNITED STATES FLY-EXIT SCREEN.

Application filed January 16, 1928. Serial h'o. Mill? This inventionpertains to a window or door screen attachment, particularly to fly exitdevices for window or door screens, and constitutes an improvement onthe device issued to applicant on January 2, 1923.

An object of this invention is the provision of a device of thischaracter, whereby the same, when properly secured on a window or doorscreen, will attract flies thereinto and provide means for enabling saidflies to pass to the opposite side of the screen 'with slightprobability of returning therethrough.

Another object of the invention is the provision of a device of thischaracter wherein the structure is novel in form, portable, and easilyattached or detached to a door or window screen in any desirableposition.

A further object. of theinvention is the provision of a device of thischaracter which embodies means for encouraging the egress anddiscouraging the ingress of flies, which is simple in construction,eflicient in operation and which may be manufactured at low cost.

These and other objects of the inventio will be apparent from a study ofthe following detailed description taken in connection with theaccompanying drawings where- Figure 1 is a perspective View of theinvention.

Fi ure 2 is a vertical longitudinal sec-o tiona View takenrentrallythrough the de-- vice.

Figure 3 is a detail elevation of the exit spout of the device showing aportion of the supporting frame therefor in dotted lines.

- Figure 4 is a fra entar horizontal section showing one o the si es ofthe device provided with an opening and a closure plug therein. 7

The improved device comprises an inverted substantially V-shaped frame 1of suitable material such as metal orwood and 1 which the exit spout ismounted, .with a composed of upwardly converging side strips 2 and 3,said side strips'being secured together at their upper ends in anysuitable manner such as by use of brads 4, Figure 2. Positioned betweenand secured to strips 2 and 3 at a point near the lower ends thereof isa cross slat 5 of less width than said side stri s, said cross slat 5being provided with a c annel 6 for the urpose of receiving a suitablelure such as bait *Z. The cross slat 5 is also provided with abeveledouter ed e as at 6.

ecured to the edges of strips .93 and 3 of the frame 1 are inner andouterreticulated wire mesh fabric sections 8 and 9, the outer section 9extending from a pointnear the apex of frame 1 to a point remote fromthe lower end thereof so that the lower edge of section 9 is'in a planewith the horizontal upper face of slat '5. The inner section of fabric 8extends from the apex of frame 1 to a point flush with the lower endthereof, These wire mesh sections 8 and 9, when secured to frame 1together with cross slat 5 constitute an ericlosure 10 into which fiies,

lured by bait 7, enter through an opening near the lower end thereofformed by narrow cross slat 5 and the lower edgeof fabric section 9. r

The side strip 2 is provided, at a point above the channel 6 in slat 5,with an opening 11, normally closed by a plug 12. Upon removal of plug12 access may be had to the interior of enclosure 10, thus permittingthe introduction of bait into the channel 6 of cross slat 5. Closureplug 12 prevents the escape/throughopening 11, of any flies that mayhave entered enclosure 10.

Mounted on one side of frame 1 at a point near the apex thereof is anexit tube or spout 13, preferably of metal, said exit tube consisting ofa tapering body portion extending outwardly and upwardly from the frame,

being secured theretoby means of integral ears or flanges l i formed onone end of said tube. The tube 13 opens into enclosure 10 a? ittgsdlowerend for a purpose to be presently s a Secured tothe other side of frame1 and extending from the apex thereof to a point remote from the upperface of cross slat 5 is a shade member 15 of suitable opaque material,the function of which is to render dark that side of the; enclosureopposite the entrance to the exit-spout 13.

The frame lis provided, onthe side upon plurality of outwardly anddownwardly extending supporting prongs 16, adapted to engage with thewire mesh of a window or door screen. I

lows

The operation, the invention is as fol- An opening of sufiicient size isformed in v the window or door screen to which the (16- I vice is to beattached and the spout 13 is projected therethrough. The supportingprongs are passed through the mesh of the screen, thus securing thedevice to said screen. When in this position, flies, alighting on thescreen, will be attracted by bait 7 and enter enclosure 10 through theopening formed. in the lower end of the device. Upon entering theenclosure 10 the flies, will be directed toward exit spout 13 -by reasonof the converging walls 2 and 3 of frame 1. Shade element 15 will causethe flies to be attracted to said exit spout by reason of the lightentering therethrough. The urge being constantly to move upwardly towardthe light, the fiiesare thus guided to the opposite or outside of thescreen.

Having thus described my invention, What I claim is ,.1. A device of thecharacter described comprising an inverted substantially V- shaped frameincluding a pair of converging strips forming the sides thereof, wiremesh fabric sections secured to the edges of the frame, a cross slat ofless width than the frame and having an inwardly beveled edge secured insaid frame at a point near the lower end thereof and in connection. withthe wire mesh fabric sections, forming an enclosure having an opening inthe lower portion thereof, said cross slat being provided with a channelforming a bait receptacle, an exit spout for said enclosure and meansprovided on one of the sides of the frame, in proximity to one end ofsaid bait receptacle and above the channel therein whereby access may behad to the latter.

2. A device of the character described comprising an invertedsubstantially V- shaped enclosure having a foraminous front and rearwall, an exit spout extending through said rear wall near the apexthereof and further rojecting outwardly and upwardly therefrom, a pairof oppositely disposed perforated leg members carried by the spout andpositioned against the inner face of said rear wall and secured to theside portions of the enclosure, and an upwardly extending perforated earcarried by the spout andadapted to be secured to the apex of theenclosure.

3. A'device for the purpose set forth comprising an enclosure formingbody includirig a pair of converging side walls, a foraminous front walland a foraminous rear Wall, an opaque triangular shaped shade elementsecured against the outer face of the hereto. I

JEREMIAH MARSDEN

